Putter



FIG. 1 is a front view of putter showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom view thereof.

The ornamental design for a putter, as shown and described.